I used to use a task killer, but after my friend pointed out that, given that the tasks you're most likely to be killing are those that auto-launch without you wanting them, they'll just be launching and getting killed, re-launching and re-killing, re-launching and re-killing... basically using up more processor than they would just sitting idle in the background. Watchdog Lite is a good app for checking in on what's using what and killing things if they go over on their CPU usage. It's also got a tiny widget so you don't have to open the whole thing. Since I've been using it, I've got an average of 25 things running and maybe 2% of CPU used at any given time. My battery life has also actually improved since quitting the task-killers.

Seesmic is a great Twitter client. I haven't tried the standard Twitter app in a while, but Seesmic has always been my preferred app. Skyfire is a great browser. Pretty fast, view the page as you would on a normal PC browser and, because things are rendered on their side of things first, you can watch most embedded videos without having to open an outside app or using a plugin.

For music, Slacker, Last.fm and Pandora all offer their own unique song sets, so it's not a bad idea to have them all. XiiaLive is great for streaming stations and can keep a favorites list. I prefer MortPlayer over the default player for the same reason my last three mp3 players have been Rockboxed -- it organizes your music by folder, not tags. If you listen to many podcasts, Google Listen is perfect. It's integrated into Google Reader, so if you're using that to handle your RSS feeds already, you can run across a podcast on your PC, subscribe in GReader and it'll instantly be on your phone waiting for you. I used to use Slacker for podcasts (found a few of my current favorites on there, actually), but given that it streams instead of downloading, I'd occasionally get dropped mid-show and not be able to auto-pickup where I left off. They might have fixed this in recent updates, but given the advantages of GListen, I'll just stick with that.

The Kindle app is great. Just about to finish Guillermo del Toro's The Strain on there. WordPlayer is good for open ebooks. I read Cory Doctorow's Little Brother on it much faster than I would have were it on actual paper. If you download comics, Droid Comic Viewer is very nice. I plowed through a ten volume manga with no hassle from it. It even gives you the option of where to start reading - top left for western, top right for asian, which comes in handy depending on what you're reading.

Please allow me to make a few suggestions. If you have a barcode scanner app, you can just scan these QR codes! How cool is that?

Touiteur is my favorite twitter app:

andFTP has turned out to be handy several times:

Aldiko has been my ebook reader of choice for my phone but hasn't gotten much use since I was given a Nook. Still cool though.

Because I'm a D&D nerd, I love Dicebag:

Just because it's a purdy way to view your images, you should check out FloatingImage:

I freakin' LOVE Dropbox and squealed like a lil girl when it came out for Android:

I made all these QR codes with AppReferer:

Tasker is the most amazing app on the market in my opinion. You can completely customize your phone. It does have a steep learning curve, but you can just follow instructions that other people create as well.

I use my AKPad daily, especially for random music I want to check out later at home.Dolphin browser is incredible, I use that daily of course.My most used app however is different, I havent seen anyone else mention it: I use the level app ALOT. parking a motorhome, camera work, beehive stuff...its endless how much shit I have that requires a level.

Got to give another shoutout to Google Listen. If you're using Google Reader in any capacity (and if not, really - why not) it just works. Really well. I had it installed a couple of weeks before I properly figured out its utility, but once I did I was away. It's brilliant.

I don't use my phone for a lot other than texts/maps, so there aren't a ton of apps I use. But I really like these:

Tweetdeck - Cleaner and nicer looking than any other Twitter app I've tried on Android. And can bundle in your facebook/buzz feeds right into the timeline which makes it nice to just have the one app. Also the Android Facebook app is awful, so this is a nice replacement.

Chrome to Phone - Rarely used, but nice to have handy incase I want to continue reading an article on the go, or toss a map location over to my phone (tho I normally star a location on google maps and it is synced to my phone).

Kindle for AndroidNook app (I have a rooted Nook Color)Seesmic--I love this so much more than the Desktop app.Comixology appGraphic.ly appAlkido for all my other ebook readingJota text editor is nice, still looking for something betterDropboxPerfect Viewer for reading my .cbr collection.Download All files, which is a little program which is useful for downloading files from webpages, or your email.

Instapaper has been a mainstay of mine for some time. It allows me not to lose and easily to read all the interesting articles I find and forget about. But now that I have integrated Evernote and Google Calendar into my personal organisation routines, I don't forget things, places, ideas, or appointments. Genuinely lifechanging.

Firefox Mobile's Sync feature allows seamless browsing continuity between your main browser and your mobile Firefox, which is a wonderful idea and works beautifully in practice. The downside is that FF Mobile doesn't do Flash. For me that's a showstopper; if I wanted a telephone which couldn't browse the web properly I'd have bought an iPhone. (I kid!)

Astro file reader, to keep track of what's eating all the drive space without plugging it into a computer.

Evernote is nice; dropbox turned out to be excessive.

Spotify, excellent both as regular music player and streaming service, as long as you make sure you run it in offline mode, and load playlists while in a wifi zone

RetroCam made nice little polaroidish pictures which fitted my blog format perfectly. Suddenly stopped working after an update. Haven't been able to make it work since.

GTasks plugs into your google calendar/mail tasklists. Simple, quick to do-list, with an interface better and more intuitive that google's own.

WiFi Manager; autosearch, ability to set up favourite spots as separate icons. Doesn't cover some forms of authentication, but those appear to be impervious to the whole android os anyway.

Google maps with the full pile of overlays; in five minutes, located two thai restaurants with reasonable toom yang kung and a vegan menu within ten minutes walk of a micro brewery. I'm in love.

AlarmDroid; fully customizable wakeup call; rings with custom mp3's, ringtones, or online radio stream. Can be set to require you to solve an arithemitic problem before it shuts up. Worked like a charm, but got incredibly frustrating.

The tattoo comes with the Peep twitter widget.

Used to run the Opera web browser, but haven't bothered to reinstall it after I had to reset the phone due to some weirdness I suspect was caused by that useless task killer program. I mostly just use the browser to read a couple of newsblogs, which I keep as start pages.